Imports cloud.google.com/go/compute/metadata firebase.google.com/go firebase.google.com/go/auth github.com/golang-jwt/jwt github.com/google/uuid github.com/patrickmn/go-cache google.golang.org/api/option google.golang.org/api/servicecontrol/v1 Standard library imports context crypto/rsa crypto/sha512 crypto/x509 encoding/hex encoding/json encoding/pem errors fmt io log net/http net/url os sync time